Feed-roller of type-writers.



E. J. PILBLAD & A. TOM LINSON. I

FEED ROLLER OF TYPE WRITERS.

APPLICATION FILED JULY 31,1914.

1,153,567. PatentedSept. 14, 1915.

COLUMBIA PLANOORAPH CO" WASHINGTON. D' C.

FQE.

ERIC JULIUS runner) AND ARTHUR TOMLINSON, or LEICESTER, nnctnivnnssienons r0 IMPERIAL TYPEW-RITEB. COMPANY, IMIT D, or LEIQESTER, ENGLAND.

FEED-ROLLER OF TYPE-WRITERS.

' Application filed July 31,1914. Seria1N o,854, 2 76.

To all whom it may concern .Be it known that we, Emo JULrUs PIL- BLAD and ARTHUR Toarmnson, sub ects re-.

spectively, of the Kings of Sweden and of England, residing at Leicester, England,

have invented certain new and useful Improvements in Feed'Rollers of Type-VVrit-.

ers, of which the following is a specification.

This invention is for improvements in or relating tothe feed-rollers of typewriters and has for its object toprovide an improved construction whereby the paper is prevented from crinkling when it is fed backward in the machine. "This occurs when the second or auxiliary feed-roller -is allowed to turn with thepaper.

Accordingly the present invention consists in the combination a typewriter, with an auxiliary feed-roller of means automatically preventing it from rotation in one direction, whereby the crinkling of the paper above-mentioned is prevented.

The, invention mayhoonsist in the combination of a typewriter with an auxiliary feed-roller of a pivoted brake-member, which may be a serrated plate bearing againstthe curved surface of the roller in such manner that the rotation of the roller in one direction thrusts the brake-member away, but rotation in the other direction draws it in and locks the roller against fur- V ther rotation in that direction;

The brake-member may be a yieldinglycontrolled plate having a wedging surface which is held in contact with the roller in such position .that it can be drawn in as,

above described.

Further features of the invention are hereinafter described and the novel details set forth in the claims.

In the accompanying drawingsi igure 1 shows such parts of the typewriter as are necessary for the understanding of the invention in their normal operating position. A: ig. 9 shows the parts with the brake-member in operation preventing backward rotation of the auxiliary feed-roller. Fig. 3 is a plan. Like reference letters indicate like parts throughout the drawings.

The platen A around which the paper passes is provided with a paper strap B. Lugs B are provided on the strap B to receive a pivot pin B on which is hinged a bracket C which carries -the auxiliary feedroller D pivoted in two pro ecting arms 0 T his roller is usually made of indiarubber or like material. A slot is provided in the paper strap B and the roller is pressed forward by aspring C attached to a lug C on the bracket C, through this slot on to the platen A, or on to the paper on the platen.

Within the bracket C and pivotally mounted on the pin B is a brake-member E. This consists of a plate E provided with upstanding flanges E which are bored to receive the pivot pin B ,,and the plate E is bent around as at Fi ed as to lie against the auxiliary feed-roller D, the face of the part E of the brake-member which bears against the roller is provided with serrations E which increase the grip ofthe brake-member upon the roller. The plate is so shaped at E as to constitute a wedge member, and it is of such length that it cannot swing down freely between the roller D and its own pivot, but it is sufficiently short to be drawn down by the roller on reverse rotation until it firmly wedges the roller against further movement that direction.

The brake-member Eduring normal operation lies in contact with the auxiliary feed-roller at the pointF' Fig. 1, and the parts are so disposed that the point F lies above the, line joining the pivotal axis of the.brakemember to the axis D of the roller D;"b y this disposition the brake is gravity controlled, but ifit is desired to arrange in some other waya spring may be used to hold it yieldingly in contact with theroller SQthatit operates in the same way as if gravity controlled.

In the normal operation of the machine the platen is turned in the direction indicated by the arrow G, Fig. 1; the auxiliary feed-roller D turns in the direction indicated by the arrow G Fig. 1, and it therefore tends to turn the brake-member E about its.

pivot so that the part E moves upward away from the roller D. When it is desired to feed the paper backwardin the machine the platen is turned in the direction indi cated by the arrow H, Fig. 2, and the feedroller is thereupon turned in the direction indicated by the arrow H in Fig. 2. The

brake-member is engaged at the point F by the roller D, and this rotation of the roller turns the brake-member E down into the position shown in Fig. 2, and the part having the serrations E is thereby pressed against the roller D and locks it against further rotation in that direction.

It will be appreciated that the main feedroller delivers the paper normally to the auxiliary feed-rollers which then rotate, but

, a yielding control maintaining the wedging when the movement of the paper is reversed, the auxiliary feed-rollers are held stationary and the paper is drawn from them to the main feed-roller, this method of operasire to secure by Letters Patent is 1. Ina typewriter the combination of, a platen, an auxiliary feed-roller bearing thereon, a movable brake-member having a wedging surface bearing on the auxiliary feed-roller in such position that it is drawn in by rotation of the roller in one direction,

and'wedges it against further rotation, and

surface in contact with the auxiliary feedroller, substantially as set forth.

2.. In a typewriter the combination of, a

platen, an auxiliary feed-roller bearing thereon, a pivoted brake-member having a wedging surface .bearing on the auxiliary feed-roller in such position as to be thrust away therefrom by'rotation in one direction and drawn in to hold the roller by movementin the other direction, and a yielding control maintaining the wedging surface in contact withthe auxiliary feed-roller,-substantially as set forth.

3. In a typewriter the'combination of, a

platen, an auxiliary feed-roller hearing if thereon, a strut pivoted about an axis parallel with the axis of the auxiliary. feedroller and having a wedging face lying '4. In a typewriter the com bination of, a

platen, an auxiliary feed-roller bearing thereon, a strut pivoted about an axis parallel to the said roller and having a serrated wedging face lying against the roller, the

pivotala xis being so disposed that the wedging surface is maintained in position by the weight of the strut, and the strut being of such length that it cannot swing down freely between the auxiliary feed-roller and its own pivot, but is sufficiently short to be drawn down by the said roller on reverse rotation to firmly wedge the roller, substantially as set forth. 1 i

5. In a typewriter the combination of, a platen, a main feed-roller, an auxiliary feedroller on the delivery side of themain feed.

roller, a movable brakemember having a 'wedging surface bearing on the auxiliary feed-roller in such position that itis drawn in by rotation of the roller: in one directionand wedges it against further rotation, and a y elding control maintaining the wedging surface in contact with the auxiliary'feedroller, substantially as set forth.

In testimony whereof we have signed our names tothis specification in the presence of two subscribing witnesses.

uro JULIUS PILBLAD. ARTHUR To LrNsoN.

WVitnesses: V 7 7 FRED W. DAwsoN,

WALTER GORDON.

Copies of this patent may'be obtained for five cents each, by addressing' the Commissioner of Patents,

Washington, D. C. 

